Grinding attachment for lathes.



A P. SPIEGEL. GRINDING `ATTACHMENT FOR LATHBS.

APPLICATION lFILED 00T.15, 1912.

. 1,047,71 7 Patented Dec. 17, 1912.

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o IN1@ P. SPIEGEL. GRINDING ATTACHMENT PoR LATHES.

APPLICATION FILED 0OT.'15, 1912. 1,()l];'7,2"1"/, Patented Dec. 17, 1912..

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f5 v f f/ UNITED STAWENTIOFFIGE- f .PAUL SPIEGEL, oie-NEW YORK, N. Y.

enINDrNG ATTACHMENT rola LATHES.

Specification, of Letters Patent. y Patehted Dec. 17,1912. Application led October 15, 1912. Serial No. 725,852'. i

To all whom t may concem Beit-known` thatl, PAUL SP1-EGEL, a subject of the Czarof Russia, and resident of the lcity of .New York, in the county of New York 'and State of New York, have invented certain new and-useful., Improvements 1n Grinding `Attachments for Lathes, of' which the'y followin is a specification.

The present invention relatesto grindlng attachments for lathes, and has for one 'of its objects to provide a simple' and eflicient device of this type, bymeans of which tools can be. ground and sharpened'without interfering with the operation of the lathe proper.

Another object of the invention is toproduce a device of 'this .character which can be easily brought into an inoperative position' upon the lathe'without the necessityof of which the work upon the 'lathe can be ground speedily and accurately, permitting tools to be ground simultaneously.

With these and other objects in view, which will more fully appear as the nature of the invention is better understood, the same consists in the combination, arrangement and construction of parts hereinafter fully described, pointed out in the appended claims and illustrated in the accompanying drawings, itbeing understood that many changes maybe lmade in the size and proportion of the several parts and lminor detailsv of construction within the scope of the appended claims without departing from the spirit or sacricing any of the advantages of the invention.

. One of the many possible embodiments of the invention is illustrated in theaccom- Q panying drawings, in which:-y

A Figure 1 is a front elevation of a portion i of a lathe with the attachment thereon; Fig.

2 is a side'elcvation thereof;Fig. 3 is a" plan view thereof; Fig. 4 is a plan view of a portion. of the attachment with the means thereon for grinding the work upon the lathe; and Fig. 5 is a plan view of a modification of the deviceshown in Fig. 4.

. Inthe drawings only as muchof the lathe is illustrated which is suicient to show the` manner of attaching and the relation of the oleilflice, comprisingthe invention, to the at e,

' In the drawings ,'the numeral 1 0 indicates mediaryof a suitable belt driving the spindle. y

The attachment comprises a base plate 15,

for the purpose of which is clamped by means of screws 16, 16 and a clamping plate 17 to the bed plate 10 of the lathe in front of the driving pulley '14. "The base plate carries xedly attached -.thereto two upwardly. projecting lugs 15',

which' carry a stationary arbor 18 substantially parallel to the lathe spindle 13. Between the two lugs is oscillatably mounted .upon this arbor an upwardly extending frame 19, in the form` .of a plate member, which'carries upon`its upper free end bear` ings 20 for the grinding wheel shaft 21. To

one end of this shaft is attached by collars 22 a grinding wheel 23 of any suitable size, which is, preferably, made of emery or similar material. shifting movement .ofthe spindle, its other end isin engagement with stop nuts 24. Between the two bearings20, 20 is xedly attached to the -shaft 21 a spur. gear 25, inA mesh with a similar gear 26, the latter being keyed or otherwise attached to a spindle 27 which is rotatably mounted in a; bearing 28, formed upon a forward extension 19 of the plate member 19. To the spindle 27 is furthermore secured ka friction pulley 29, pro- To prevent' the longitudinal-v otherwise attached a stepped pulley 14, to

.which power is applied throughthe intervided `upon its peripheral portion with a at 3G a lockingv bar 31, having in its lower end aslot 32, in which is adapted to be seated a stud 33, carried by the base late 15.

The locking bar 31 is provided wit a handle 34 to facilitate the engagement and disengagementthereofwithand from the stud' 33. AA spring 35 is'woundu on the station- "ary arbor 418, one end'of sai `-spring bearing against -the front face of the plate member 19, as clearly shown at 34', lts other end, denoted by the numeral 36, -hearingagainst the base plate 15. This' spring tends to bring the -pulley29 into engagement with one of the steps of the driving pulley 14 as soon as the stud 33 is disengaged from the y 32 in the locking bar 31. Such engagement keeps the pulley 29 disengaged from the pulley 14. When it is. intended to sharpen i" or grind a tool, the locking bar is disengaged from the stud 33, whereby the spring 35 forces the pulley 29finto contact -with one of the steps of the driving pulley 14, this position of the stepped pulley being shown in dot-ted lines in Fig. 2 of the drawings. Mot-ion is thus transmitted by frictional contact to the pulley 29, and by the intermediary of the gears 26 and-25 to the grinding wheel shaft and the grinding wheel. It is obvious thus that, when y e parts are in these positions, tools can be easily ground,

and that such grinding operation will not 4' interfere with the proper operation of the lathe. When the grinding operation is performed, the attachment is forced, againstv the action of the spring 35, away from the stepped pulley and the locking bar engaged with the stud 33.

The attachment is .particularly useful in factories or shops where a number of lathes are operated. In suchplaces usually only one or two tool grinding devices are' kept. Around these devices sometimes a long line of mechanics forms, each intending to grind his tool, but compelled .to wait untill those ahead of him in the line have finished their work on the grinding devices. With theattachment herein described such difficulties are obviated, fort-he reasonthat each mechanic is' able to grind his tool whenever it' becomes necessary on his lathe without wasting timein waiting;

For grinding the work uponthe lathe, the device now described is provided with a further attachment (shown in Fig. 4 of the drawings). This attachment comprises a tuhular stud 37, provided with inner screw thrads 38, which are adapted to mesh with the screw threads- 39 upon-the grinding wheel shaft 21. The tubular stud 37 is connected by means of a universal joint 40with a tubular shaft 41, which is provided with an inwardly extending pin 42, engaging a peripheral longitudinal recess 43 of a shaft 44, the latter being connected by a universal joint 45 with, a spindle 46, to which is attached in an suitable manner a grinding `wheel 47. T e outer end of the spindle 46 is rotatably mounted in a bearing 48, which is carried by` an operating handle 49.

' The operation ofthis device is as follows: One o'f the stop nuts 24jis disengaged from the .screw threaded Afend of the grinding wheel ,shaft 21, whichlatter is brought in mesh with the inner screw threads of the stud 37. The.' friction pulley 29 is then brought into engagement in the manner above described with the` stepped pulley, whereby rotation is impartedto 'the grinding Wheel 47 There being a exible connectionbetween the shaft 21and the spindle 46, it is obvious'that by taking hold of the handle 49, the grinding Wheel can be applied'.

to t-he Work upon the-lathe at any desired height and angle. The. shaft 44 being slidably varranged in the tubular shaft 41, the distance between the pulley 14 andl the grinding wheel 47 may be varied, at will,

permitting thereby of an operation of the grinding wheel 47 throughout the length of" the Work. It is obvious that, while the grinding wheel 47 operates upon the'work,

. adapted to be clamped lto the tool post of the lathe. Upon the spindle 46 is mounted a pulley 51, pver which runs a belt 52, engaging `a pulley 53, which is attached to a shaft 54, the latter being mounted rotatably in the tool holder 50. Tothe free end of the shaft 54 is secured a Grinding wheel 55.

The cylinder or other dbject to be ground interiorlyis-supported in the usual manner upon the lathe. The tool holder 50 with the from one end to the other, or asV much as it might be desired.

What I claim is 1. In a grinding'V attachment for lathes, the combination with the bed plate and the driving pulley of a lat-he, of an upwardly extending frame fulcrumed in front of said driving pulley to said bed plate, a shaft rotatably mounted in said frame, a grinding v grinding wheel 55-can be made to travel wheel carried by saidv shaft, a friction pulley upon said frame adapted to contact with said driving pulley, a driving connection between said friction pulley and said shaft, locking means for holding said frame in a position to keep said friction pulley disengaged from said driving pulley, and a spring adapted upon the disengagement of `said lockingv meansl to swing said fra-me around lts pivot, whereby said friction pulley is brought into contact with said driving pulley.

2. Inja grinding .attachment for lathes, holding said frame and the parts carried the. combination with the bed plate and the thereby in position to render-saidl friction driving pulley of a lathe, of an upwardly drive inoperative., f

extending frame fulcrumed in front of Said Signed at New. York, in the county of 5 drivingr pulley t-o said bed plate, -a shaft ro- New York and State of New York, this 11th I5 tatably mounted in said frame, a friction day of October, A. 111912. drive Abetween Said shaft and said driving U PAUL SFIEGEL.. pulley, a grinding wheel, a ieXible driving Witnesses: z shaft attached to said grinding whe'el and SIGMUND'HERZOG, 10 .said first mentioned shaft, andmeans for M. FRIEDLANDER.v

Copies' of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D. C. 

